声波法直埋热水供热管道泄漏检测定位  

Leakage Detection and Localization of Direct Buried Hot Water Heating Pipeline by Acoustic Wave Method

作　　者：郭帅杰 张立申[2] 李成 穆连波 王随林 鲁军辉 GUO Shuai-jie;ZHANG Li-shen;LI Cheng;MU Lian-bo;WANG Sui-lin;LU Jun-hui(School of Environment and Energy Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Beijing Thermal Group Co.,Ltd.,Beijing 100028,China;Beijing Jingda Shenneng Technology Co.,Ltd.,Beijing 100037,China)

机构地区：[1]北京建筑大学环境与能源工程学院,北京100044 [2]北京市热力集团有限公司,北京100028 [3]北京京大深能科技有限公司,北京100037

出　　处：《科学技术与工程》2023年第11期4765-4772,共8页Science Technology and Engineering

基　　金：北京市热力集团合作项目(KY191007);北京学者计划资助项目(2015NO.022);北京市教育委员会科研计划(KM202310016006)。

摘　　要：为快速诊断供热管网泄漏,提升供热管网运行安全,搭建了供热管道泄漏检测与定位的试验台,采用加速度传感器进行声波测量,研究供热管道不同运行压力、温度、泄漏孔径、漏点位置等对供热管道泄漏声波特性与漏点定位的影响。结果表明:供热管道未泄漏时背景噪声能量集中在0~1000 Hz,泄漏后的声波能量集中在1200~2400 Hz和3200~4000 Hz范围。管内压力和泄漏孔径增大后,泄漏声波信号幅值增大,信号能量增强,高频段能量占比增加,漏点定位精度提高;而温度升高后,泄漏声波信号幅值减小,信号能量减弱,低频段能量占比增加,漏点定位精度下降;漏点相对位置对漏点定位精度影响小,带通滤波处理后,漏点定位精度明显提高。In order to quickly diagnose the leakage of heating pipe network and improve its operation safety,a test apparatus for leakage detection and localization of heating pipe was built,and the acceleration sensors were used to measure the acoustic waves,the influence of different operation pressure,temperature,leakage aperture and leakage point location on leakage acoustic wave characteristics and leakage localization of heating pipeline were studied.The results indicate that when there is no leakage in heating pipe,the background noise energy is concentrated in the range of 0~1000 Hz,after leakage occurs,the acoustic energy due to leaking will be concentrated in the range of 1200~2400 Hz and 3200~4000 Hz.With the increase of pressure and leakage aperture,the amplitude of leakage acoustic signal increases,the signal energy increases,the proportion of high frequency band energy increases,and the leakage localization becomes accurate.However,with the temperature increase,the amplitude of leakage acoustic signal decreases,the signal energy decreases,the proportion of low frequency band energy increases,and the leakage localization gets worse,the relative position of leakage point has little influence on the leakage localization accuracy,the approach by bandpass filtering could significantly improve the accuracy.

关 键 词：声波法 热水供热管道 泄漏检测 漏点定位 滤波 

分 类 号：TU995.3[建筑科学—供热、供燃气、通风及空调工程]